Complete Question:
The mean life of a large shipment of CFLs is equal to 7,500 hours. The population standard deviation is 1,000 hours. A random sample of 64 CFLs indicate a sample life of 7,250 hours.
1. State the Null and Alternative Hypothesis.
2. At the 0.05 level of significance, is there evidence that mean life is different from 7,500 hours.
3. Construct a 95% confidence interval estimate of the population mean life of the CFLs.
4. Compute the p-value and interpret its meaning.
Answer:
-2, (7005, 7450), 0.045
Explanation:
1).
H₀: mean of life shipment is 7500 hours
the hypothesis are outlined as follows
H₀: 
7500
H₁: 
7500
where, n = 64, x = 7250, 
1000 hours
Test statistics:
Our conclusion from the above result is that there is sufficient evidence to say that the mean life is different from 7500 hours
2). 95% confidence Interval for the population mean 
is
![[7250-1.96\times \frac{1000}{\sqrt{64}},7250+1.96\times \frac{1000}{\sqrt{64}} ]\\\\(7005,7495)](https://tex.z-dn.net/?f=%5B7250-1.96%5Ctimes%20%5Cfrac%7B1000%7D%7B%5Csqrt%7B64%7D%7D%2C7250%2B1.96%5Ctimes%20%5Cfrac%7B1000%7D%7B%5Csqrt%7B64%7D%7D%20%5D%5C%5C%5C%5C%287005%2C7495%29)
3).
the p-value is given by
From the information, the value of the direct material is $4130 and the direct labor cost will be $39200.
<h3>How to calculate cost</h3>
From the complete information, direct material is $4130. The direct labor cost will be:
= $31700 + $7500
= $39200
The manufacturing overhead will be:
= $3110 + $560 + $820 + $3600 + $195 + $210 + $1120 + 2120
= $11735
Prime cost will be:
= Direct material + Direct labor
= $4130 + $39200
= $43330
Learn more about cost on:
brainly.com/question/25109150
Hi,
It is <u>Scholastic Assessment Test</u><u>.</u> It is especially common in the US and Canada colleges and universities. It is a written paper-pencil test and helps evaluate the language and mathematical reasoning skills of the applicants.
<u>(</u><u>By</u><u> </u><u>Benjemin</u><u>)</u>
Answer:
I understand how frustrating it can be to have to retake an entire practice set or unit test because of one or a few mistakes
Explanation:
plz be brainleist
There are different reasons why things happens. If differential heating did not occur on earth, then there no global warming or global cooling will take place in the atmosphere.
When the Earth flat surface is facing the sun, all its part of that surface would get the same level of incoming solar radiation but the fact remains that due to the Earth being spherical in shape, sunlight is therefore not distributed evenly over the Earth’s surface and as such all the regions of Earth will be heated to different degrees.
Thus, differential heating of Earth’s surface takes place due to different reasons.
Learn more about differential heating from
brainly.com/question/25154137
